Goblin Medics

The reward for tapping is the whole point of the card, and the way that reward gets triggered is what makes the design tick. A pinger usually fires off its own activated ability or attacks; here the damage rides on the tap event itself, which means anything that taps the creature becomes a faucet for a point of damage. Attack into combat: ping. Crew, convoke, or any other cost that requires tapping it: ping. Pair it with an untapper and you have a repeatable ping that does not care about summoning sickness on the trigger. That last interaction is the design tension the card was built around, and it is exactly why a 1/1 body for this cost was acceptable: the damage is gated behind the friction of finding a way to tap it more than once per turn, and an untapped Goblin Medics on an empty board is doing nothing. The trigger-on-tap shape predates the cleaner pinger templates that followed, and it shows its age in how literal it is: the card does not let you choose to ping, it pings whenever the tap happens, which can occasionally point a damage you did not want to assign. A small, fiddly engine piece from an era when red's incremental-damage creatures were still being prototyped, more puzzle box than staple.